No idea this was such a thing, gonna have to give it a read.
Wonder if the 2001 escape game Mystery of Time and Space (MOTAS) counts for this category. Is a prime example of how escape games should be. today most of the so called ‘‘escape’’ ames are mediocre collect-a-thons (being free games is no excuse). I recently re-discovered the game to learn that the original site hosting it went offline and the creator abandoned the game after 20 levels back in 2008. The game is still available to play at another site, but it only has the original 12 stages when the game was new. Being a flash game means it will probably be gone for good very soon.
Also, RIP Club Penguin